NO165979B - DEVICE FOR HIGH-FREQUENCY ENERGY DISTRIBUTION. - Google Patents
DEVICE FOR HIGH-FREQUENCY ENERGY DISTRIBUTION. Download PDFInfo
- Publication number
- NO165979B NO165979B NO850522A NO850522A NO165979B NO 165979 B NO165979 B NO 165979B NO 850522 A NO850522 A NO 850522A NO 850522 A NO850522 A NO 850522A NO 165979 B NO165979 B NO 165979B
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- NO
- Norway
- Prior art keywords
- outputs
- transformer
- decoupling
- output
- distribution
- Prior art date
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- 230000006978 adaptation Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
- H03H7/482—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source particularly adapted for use in common antenna systems
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- General Induction Heating (AREA)
- Electrotherapy Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Television Systems (AREA)
- Discharge Heating (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Recrystallisation Techniques (AREA)
- Developing Agents For Electrophotography (AREA)
- Particle Accelerators (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vibration Dampers (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Abstract
Description
Foreliggende oppfinnelse angår en anordning for fordeling av høyfrekvens-energi på to innbyrdes avkoblede, impedanstilpassede utganger. En sådan fordelingsanordning er f.eks. kjent fra DE-AS 2.807.327, hvor avkoblingsimpedansen utgjøres av en ohmsk motstand innkoblet mellom de to utganger og hvis størrelse tilsvarer den dobbelte bølgemotstand ved symmetrisk fordeling. Sådanne fordelingsanordninger benyttes f.eks. i antennekoblingsbokser med liten koblingsdempning (< 10 dB), mens de er vanskelige å realisere i praksis i retningskoblere, særlig ved høye frekvenser. Imidlertid er det mulig ved symmetrisk fordeling i VHFområdet på denne måte å oppnå en koblingsdempning på høyst 22 dB mellom utgangene (tilsvarende 25 dB mellom likefrekvente sammenkoblinger av to antennekoblingsbokser) over sådanne fordelingsanordninger. Denne verdi er også tilstrekkelig for mange anvendelser i antenneanlegg for et enkelt apparat eller mindre apparatgrupper, men oppfyller ikke på langt nær de fordringer som stilles av "Deutschen Bundespost (retningslinje 1 R 8-15) for anvendelse i bred-båndede kabelanlegg. I henhold til disse fordringer må det mellom tilstøtende koblingsbokser for samme frekvens foreligge en koblingsdempning £ 40 dB i frekvensområdet 47-300 MHz. Anvendelsesmulighetene for den ovenfor angitte kjente fordelingsanordning er således i vesentlig grad begrenset. The present invention relates to a device for distributing high-frequency energy on two mutually disconnected, impedance-matched outputs. Such a distribution device is e.g. known from DE-AS 2,807,327, where the decoupling impedance consists of an ohmic resistance connected between the two outputs and whose size corresponds to the double wave resistance in case of symmetrical distribution. Such distribution devices are used e.g. in antenna junction boxes with low coupling attenuation (< 10 dB), while they are difficult to realize in practice in directional couplers, particularly at high frequencies. However, with symmetrical distribution in the VHF range in this way, it is possible to achieve a coupling attenuation of no more than 22 dB between the outputs (corresponding to 25 dB between equal-frequency interconnections of two antenna junction boxes) over such distribution devices. This value is also sufficient for many applications in antenna systems for a single device or smaller groups of devices, but does not nearly meet the requirements set by the "Deutschen Bundespost (guideline 1 R 8-15) for use in broadband cable systems. According to these requirements, there must be a coupling attenuation £ 40 dB between adjacent junction boxes for the same frequency in the frequency range 47-300 MHz. The application possibilities for the above-mentioned known distribution device are thus substantially limited.
Det er derfor et formål for foreliggende oppfinnelse å frembringe en høyfrekvens-fordelingsanordning av ovenfor angitt art, hvor den ovenfor angitte avkoblingsfordring er oppfylt på enklest og mest mulig kostnadsgunstig måte over et størst mulig frekvensområde samt ved god tilpasning for alle tilkoblinger. It is therefore an object of the present invention to produce a high-frequency distribution device of the above-mentioned kind, where the above-mentioned disconnection requirement is fulfilled in the simplest and most cost-effective way possible over the largest possible frequency range as well as by good adaptation for all connections.
Oppfinnelsen gjelder således en anordning for fordeling av høyfrekvensenergi innenfor VHF/UHF-området på to innbyrdes avkoblede, impedanstilpassede utganger, idet anordningen omfatter en tilpasnings- og en differensialtransformator som hver oppviser en vikling med en avtapning og hvor de to avtapninger er innbyrdes sammenkoblet, samt en ohmsk avkoblingsmotstand som er innkoblet mellom tilpasningstransformatoren og en en av de to utganger ved symmetrisk fordeling samt den mest høyohmige utgang ved usymmetrisk fordeling. The invention thus relates to a device for distributing high-frequency energy within the VHF/UHF range on two mutually decoupled, impedance-matched outputs, the device comprising an adaptation and a differential transformer each of which has a winding with a tap and where the two taps are interconnected, as well as an ohmic decoupling resistor which is connected between the adaptation transformer and one of the two outputs in the case of symmetrical distribution and the most high-ohmic output in the case of asymmetrical distribution.
På denne bakgrunn av prinsipielt kjent teknikk fra ovenfor angitte utlegningsskrift samt US-A 4.275.365 har så ansøkningen i henhold til oppfinnelsen som særtrekk at avkoblingsmotstandens tilkoblingspunkt på tilpasningstransformatoren er forskjellig fra denne transformators avtapning, og motstandens størrelse samt dens nevnte tilkoblingspunkt er valgt slik at såvel avkoblingen mellom de to utganger som tilpasningen til den mest høyohmige utgang oppviser en optimal verdi. Based on this background of known technology in principle from the above-mentioned explanatory document as well as US-A 4,275,365, the application according to the invention has as a distinctive feature that the disconnecting resistor's connection point on the matching transformer is different from this transformer's tap, and the size of the resistor and its mentioned connection point are chosen so that both the decoupling between the two outputs and the adaptation to the most high-impedance output show an optimal value.
Ved denne utførelse i henhold til oppfinnelsen er det uten vesentlig ytterligere komponentanvendelse overfor den angitte teknikkens stilling (bare en eneste ohmsk motstand) og innenfor hele VHF/UHF-området (47 - 790 MHz) mellom de to utganger fra fordelingsanordningen oppnådd en koblingsdempning £ 40 dB, såvel som en tilbakeløpsdempning på aR £ 20 dB ved alle tilkoblinger. Avkoblingen mellom to tilsluttede gjennomløpsbokser er derved innenfor samme frekvensområde ved symmetrisk fordeling £ 43 dB, således at fordelingsanordningen i henhold til oppfinnelsen også er egnet for direkte tilkobling (uten fordeler) av avslutningsbokser. With this embodiment according to the invention, without significantly additional component use compared to the position of the stated technique (only a single ohmic resistance) and within the entire VHF/UHF range (47 - 790 MHz) between the two outputs from the distribution device, a coupling attenuation £ 40 has been achieved dB, as well as a return attenuation of aR £ 20 dB at all connections. The disconnection between two connected feed-through boxes is therefore within the same frequency range with symmetrical distribution £ 43 dB, so that the distribution device according to the invention is also suitable for direct connection (without advantages) of termination boxes.
Denne utførelse i henhold til oppfinnelsen er ikke bare egnet for koblinger med viklede transformatorer, men fremfor alt også for koblinger med transformatorer utført i trykt krets, da tilvirkningstoleransene er minimale ved sådanne utførelser og ingen spesielle tiltak behøver å treffes for å frembringe avtapningspunkter, således at de ovenfor angitte avkoblings- og tilpasningsverdier også kan oppnås sikkert og uten utligning ved seriefremstilling. This embodiment according to the invention is not only suitable for connections with wound transformers, but above all also for connections with transformers made in printed circuit, as the manufacturing tolerances are minimal with such designs and no special measures need to be taken to produce tapping points, so that the above stated decoupling and adjustment values can also be achieved safely and without compensation in serial production.
Den vedføyde figur viser et utførelseseksempel av fordelingsanordningen i henhold til oppfinnelsen innrettet for anvendelse i antennekoblingsbokser med innkoblingsdempning på The attached figure shows an exemplary embodiment of the distribution device according to the invention designed for use in antenna junction boxes with connection damping on
6 dB. Herunder er det for oversiktens skyld utelatt et filter tilsluttet en av utgangene for å skille radiofrekvensene fra fj ernsyns frekvensene. Fordeleranordningen for todeling av høyfrekvensenergi oppviser en tilpasningstransformator U]_ mellom inngangen E og metall-masse samt, en differensialtransformator U2 som forbinder de to utganger A^, A2. Denne transformator er for å unngå unødige tap på kjent måte utført som sparetransformator med viklinger med lite vindingstall som forløper i rørkjerner. Utgangen A^ er for tilkobling til inngangen av fordeleranordningen utført med en ytterligere antennestikkontakt, mens utgangen A2 er — beregnet for tilslutning til et filter for adskillelse av radiofrekvenser og fjernsynsfrekvenser. På grunn av de forskjellige vindingstall i tilpasningstransformatorens viklinger er strømmene i transformatorens to utgangsledninger ikke like og gir derved en ujevn energifordeling. For å unngå • denne uønskede virkning er på kjent måte tvangsmessig poten-sialutligning anordnet mellom de to ledninger som forbinder hvert sitt par av delviklinger i de to transformatorer og U2- 6dB. Below, for the sake of clarity, a filter connected to one of the outputs to separate the radio frequencies from the television frequencies has been omitted. The distributor device for dividing high-frequency energy into two exhibits an adaptation transformer U]_ between the input E and metal-mass as well as a differential transformer U2 which connects the two outputs A^, A2. In order to avoid unnecessary losses, this transformer is designed in a known manner as a spare transformer with windings with a low number of turns that run in tube cores. The output A^ is for connection to the input of the distribution device made with an additional antenna socket, while the output A2 is — intended for connection to a filter for separating radio frequencies and television frequencies. Due to the different numbers of turns in the adaptation transformer's windings, the currents in the transformer's two output lines are not equal and thereby give an uneven energy distribution. In order to avoid • this unwanted effect, in a known manner forced potential equalization is arranged between the two lines that connect each pair of sub-windings in the two transformers and U2-
For å forbedre tilpasningsverdien ved lavere frekvenser er det mellom inngangen E og tilpasningstransformatoren innkoblet en kondensator C^. Videre bevirker en kondensator C2 innkoblet mellom utligningsledningen AL og masse på kjent måte en hevning av den øvre grensefrekvens. - To improve the matching value at lower frequencies, a capacitor C^ is connected between the input E and the matching transformer. Furthermore, a capacitor C2 connected between the equalization line AL and mass causes an increase in the upper limit frequency in a known manner. -
Differensialtransformator U2 deler høyfrekvenseffekten ujevnt på sådan måte at tilkoblingsdempningen på utgangen A2 beløper seg til 6 dB, mens gjennomgangsdempningen på utgang A^ utgjør 2 dB. Differential transformer U2 divides the high-frequency power unevenly in such a way that the connection attenuation on output A2 amounts to 6 dB, while the through attenuation on output A^ amounts to 2 dB.
For bredbåndet forbedring av koblingsdempningen mellom utgangene A]_ og A2 i driftsfrekvensområder 47 - 790 MHz og sikring av en høy tilbakeløpsdempning ved alle tilkoblinger til fordelingsanordningen er det innkoblet en ohmsk motstand på 270 ohm mellom en avtapning fra tilpasningstransformatoren etter dens annen vinding regnet mot massesiden samt utgangen For wide-band improvement of the coupling damping between the outputs A]_ and A2 in operating frequency ranges 47 - 790 MHz and ensuring a high return damping at all connections to the distribution device, an ohmic resistance of 270 ohms is connected between a tap from the adaptation transformer after its second winding counted towards the ground side as well as the output
Tilpasningstransformatoren er oppbygget slik at inngangs-tilkoblingen E er tilpasset ved at også inngangsimpedansen av differensialtransformatoren U2 og den ohmske motstand R er tatt i betraktning. Ved denne fordeleranordning er det med minst mulig komponentanvendelse og over et meget stor frekvensområde tilsiktet en koblingsdempning mellom de to utganger Ai og A2 på £ 40 dB, såvel som en tilbakeløpsdempning ved alle tilkoblinger på £ 20 dB. The adaptation transformer is constructed so that the input connection E is adapted by also taking the input impedance of the differential transformer U2 and the ohmic resistance R into account. With this distribution device, with the least possible use of components and over a very large frequency range, a coupling attenuation between the two outputs Ai and A2 of £ 40 dB is intended, as well as a return attenuation at all connections of £ 20 dB.
Disse gunstige verdier oppnås uten spesielle justeringstiltak også ved seriefremstilling, særlig fordi de to transformatorer da er utført i trykte kretser og derved oppviser ytterst små fremstillingstoleranser, og ingen særlige tiltak er da nød-vendig for å oppnå korrekte avtapningspunkter. These favorable values are achieved without special adjustment measures also during series production, especially because the two transformers are then made in printed circuits and thereby exhibit extremely small manufacturing tolerances, and no special measures are then necessary to achieve correct tap-off points.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843405113 DE3405113A1 (en) | 1984-02-14 | 1984-02-14 | HIGH FREQUENCY DISTRIBUTION DEVICE |
Publications (3)
Publication Number | Publication Date |
---|---|
NO850522L NO850522L (en) | 1985-08-15 |
NO165979B true NO165979B (en) | 1991-01-28 |
NO165979C NO165979C (en) | 1991-05-08 |
Family
ID=6227606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO850522A NO165979C (en) | 1984-02-14 | 1985-02-12 | DEVICE FOR HIGH-FREQUENCY ENERGY DISTRIBUTION. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0151784B1 (en) |
AT (1) | ATE60176T1 (en) |
DE (2) | DE3405113A1 (en) |
NO (1) | NO165979C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537312A1 (en) * | 1985-10-19 | 1987-04-23 | Hirschmann Radiotechnik | Radio-frequency distributor |
DE3637154A1 (en) * | 1986-10-31 | 1988-05-05 | Hirschmann Radiotechnik | Dual radiofrequency distributor |
US4893098A (en) * | 1988-12-05 | 1990-01-09 | Motorola, Inc. | 90 Degree broadband MMIC hybrid |
DE4024023C1 (en) * | 1990-07-28 | 1991-08-08 | Richard Hirschmann Gmbh & Co, 7300 Esslingen, De |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2115059A (en) * | 1935-08-12 | 1938-04-26 | Emi Ltd | High frequency electric transmission line |
US3146409A (en) * | 1960-10-27 | 1964-08-25 | Sanders Associates Inc | Multiple coupler employing resonant effects to isolate the load circuits from each other |
US3559110A (en) * | 1965-11-12 | 1971-01-26 | Amp Inc | Directional coupler |
DE2807327B1 (en) * | 1978-02-21 | 1978-12-14 | Hirschmann Radiotechnik | Device for evenly distributing high-frequency energy over two outputs |
JPS5929382Y2 (en) * | 1978-08-18 | 1984-08-23 | ホーチキ株式会社 | TV public viewing switch |
US4311974A (en) * | 1980-06-09 | 1982-01-19 | Eagle Comtronics, Inc. | Wide band directional coupler |
-
1984
- 1984-02-14 DE DE19843405113 patent/DE3405113A1/en active Granted
- 1984-12-21 AT AT84116023T patent/ATE60176T1/en active
- 1984-12-21 EP EP84116023A patent/EP0151784B1/en not_active Expired - Lifetime
- 1984-12-21 DE DE8484116023T patent/DE3483962D1/en not_active Expired - Fee Related
-
1985
- 1985-02-12 NO NO850522A patent/NO165979C/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE3405113A1 (en) | 1985-08-29 |
NO165979C (en) | 1991-05-08 |
EP0151784B1 (en) | 1991-01-16 |
EP0151784A2 (en) | 1985-08-21 |
NO850522L (en) | 1985-08-15 |
DE3405113C2 (en) | 1990-05-10 |
EP0151784A3 (en) | 1986-12-10 |
ATE60176T1 (en) | 1991-02-15 |
DE3483962D1 (en) | 1991-02-21 |
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